#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>
int main()
{
    int num = 0;
    scanf("%d", &num);
    int count = 0;
    int i = 0;
    for (i = 0; i < 32; i++)
    {
        if (num & 1 << i)
            count++;
    }
    printf("%d", count);
    return 0;
}
